Portion of a lamp



FIG. 1 is a perspective view of the portion of a lamp which embodies the design;

FIG. 2 is a first side elevational view of the portion of a lamp, the opposite side elevational view being a mirror image of FIG. 2;

FIG. 3 is a second side elevational view of the portion of a lamp which is taken from a direction which is at a right angle to the direction of the view shown in FIG. 2, the opposite side elevational view being a mirror image of FIG. 3;

FIG. 4 is a top plan view of the portion of a lamp; and,

FIG. 5 is a bottom plan view of the portion of a lamp.

Broken lines shown in the drawing are used to depict environment only, and are not a part of the design. 

The ornamental design for a portion of a lamp, as shown and described. 